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evablogger [386]

2 years ago

14

The diameter of one circle is represented by 12x. The diameter of another circle is represented by 6x^2y. What is the ratio of t

he radii of the two circles?

2 answers:

Luda [366]2 years ago

5 0

12x/2=6x---------
(6x)^2y=6^2y.x^2y-------

Vesnalui [34]2 years ago

4 0

D/2=r
$\frac{r_1}{r_2}= \frac{ \frac{d_1}{2} }{ \frac{d_2}{2} } = \frac{d_1}{d_2}$

so we don't even need to convert
12x:6x²y
divide both sides by 6x
2:xy
the ratio is 2:xy

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we know that

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In this problem

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BC=AD

see the attached figure with letters to better understand the problem

we have that

$L=BC\\W=AB$

the formula to calculate the distance between two points is equal to

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$B(5,2),C(12,-5)$

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$d=\sqrt{(-7)^{2}+(7)^{2}}$

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<em>Find out the distance AB</em>

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$A(2,-1),B(5,2)$

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we have

$L=d_B_C=\sqrt{98}\ units$

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substitute

$A=(\sqrt{98})(\sqrt{18})=42.0\ units^2$

4 0

3 years ago